IP Prefix Advertisement in EVPN - - PowerPoint PPT Presentation

draft-rabadan-l2vpn-evpn-prefix-advertisement-01

Jorge Rabadan Wim Hendericks Florin Balus Senad Palislamovic Aldrin Isaac

IP Prefix Advertisement in EVPN

IETF 88, November 2013 Vancouver, Canada

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

The prefix-advertisement route (route-type 5)

Route-types: 1- Ethernet A-D route 2- MAC-advertisement route 3- Inclusive Multicast route 4- Ethernet Segment route 5- IP Prefix route (OPTIONAL) Route-type 5 specific content

• RT 2 (MAC-advertisement) used for advertising

MACs and MAC-IP for ARP resolution)

• Also used for MAC Mobility
• RT 5 (IP-prefix) used to advertise Prefixes

independently of the mac-advertisement routes

• Possible Prefix next-hops in the overlay topology
• ESI, IRB IP address, Floating IP address

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

Use-case #1: TS IP address next-hop use-case

NVE2

TS2 (VA)

IP2/M2

VXLAN/ NVGRE

EVI-10 EVI-10

NVE3

EVI-10

DGW-1

EVI-10

DGW-2

VRF VRF

WAN

IRB1 IRB2

FW-2

TS3 (VA)

FW-3

VM

SN1

IP3/M3

VNI=1 SN1 /24 GW IP=IP3 ESI=0 VNI=1 M3 / IP3

evpn RT=2

ESI=0

evpn RT=5

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

Use-case #2: floating IP address use-case

NVE2

TS2 (VA) (ACTIVE)

IP2/M2

VXLAN/ NVGRE

EVI-10 EVI-10

NVE3

EVI-10

DGW-1

EVI-10

DGW-2

VRF VRF

WAN

IRB1 IRB2

FW-2

TS3 (VA)

FW-3

VM

SN1

IP3/M3

VNI=1 SN1 /24 GW IP=IP23 ESI=0 VNI=1 M2 / IP23

evpn RT=2

ESI=0

evpn RT=5

vIP23 (floating)

VNI=1 SN1 /24 GW IP=IP23 ESI=0

evpn RT=5

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

Use-case #3: IRB IP next-hop use-case

NVE2

VXLAN/ NVGRE

EVI-10 EVI-10

NVE3

EVI-10

DGW-1

EVI-10

DGW-2

VRF VRF

WAN

IRB1 IRB2 VM

SN1

VNI=1 SN1 /24 GW IP=IRB3 ESI=0 VNI=1 M2 / IRB3

evpn RT=2

ESI=0

evpn RT=5

VRF EVI-2 EVI-2 VRF

IRB3 IRB4

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

Use-case #4: “bump-in-the-wire” use-case (new)

NVE2

VA VXLAN/ NVGRE

EVI-10 EVI-10

NVE3

EVI-10

DGW-1

EVI-10

DGW-2

VRF VRF

WAN

IRB1 IRB2

FW

VA

FW-3

VM

SN1

VNI=10 SN1 /24 GW IP=0 ESI=23 VNI=10

evpn RT=1

ESI=23

evpn RT=5

ESI23

VNI=10 SN1 /24 GW IP=0 ESI=23

evpn RT=5

VM VM1 VM VM2

(ACTIVE)

FW FW-3

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

The prefix-advertisement route benefits

• Clean identification of a prefix
• NVEs running EVPN but not supporting the OPTIONAL prefix-

advertisement route can easily identify it an ignore it without processing the route

• No MAC information is compared by BGP when selecting routes
• Flexible overlay next-hop (IRB, floating IP

, ESI) addressing different end-point types

• Decouples prefix-advertisement from mac mobility procedures
• Supports VA resiliency procedures

draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013

Next steps

• Feedback from WG